Cast and crew started work on the dramatic scenes last night (September 10), and it is thought that the on-location filming will continue throughout the week.
Firm storyline details are currently being kept under wraps, but the Daily Mail reports that viewers will see a joyride go horribly wrong after Lauren (Jacqueline Jossa) steals her uncle Derek's car.
With Joey (David Witts) joining his cousin for the trip, both of their lives could be left hanging in the balance when Lauren loses control of the vehicle and smashes it into the front window of a shop.
Filming has been taking place in Keynsham, Somerset. Some local newspaper reports have suggested that the scenes will climax with a fireball stunt, but this remains unconfirmed.
Digital Spy understands that EastEnders will air the storyline in November, providing one of the show's biggest moments of the year.
A Walford insider commented: "Everyone is really excited about these scenes. It's going to be a huge storyline for us in a few weeks' time, so it's definitely one for the fans to watch out for."
News of Lauren and Joey's terrible accident follows recent tabloid reports suggesting that the pair could develop romantic feelings towards each other within the next few weeks.